Personalized Intelligent Tuba Long Sleeve T-Shirt. Tuba the instrument for intelligent people is a humorous low brass design. Fun gifts for musicians, students and teachers at back to school, birthdays, holidays and graduations. Pre-shrunk 100% cotton 6.1 ounce long sleeve t-shirt. Double-needle stitched neckline and sleeves. Quarter turned. Shoulder-to-shoulder taping. Adult: S, M, L, XL, 2XL, 3XL